Convenient Method for Reduction of C-N Double Bonds in Oximes, Imines, and Hydrazones Using Sodium Borohydride–Raney Ni System
作者:Yihua Yang、Shouxin Liu、Junzhang Li、Xia Tian、Xiaoli Zhen、Jianrong Han
DOI:10.1080/00397911.2011.562063
日期:2012.9
Abstract A practical method has been developed for reduction of C-N double bond in oximes, imines, and hydrazones with sodium borohydride catalyzed by Raney Ni. The reactions were carried out in basic aqueous solution, and the desired products were obtained in moderate yields after a simple procedure. This method can be applied to synthesize simpler aliphatic or aromatic amines and its analogs. GRAPHICAL
摘要 开发了一种在 Raney Ni 催化下用硼氢化钠还原肟、亚胺和腙中 CN 双键的实用方法。反应在碱性水溶液中进行,经过简单的程序,以中等收率得到所需产物。该方法可用于合成更简单的脂肪族或芳香族胺及其类似物。图形概要
An asymmetric approach to the synthesis of trans-dihydrindandione
Amorphous nickel powder (Ni0) was utilised as a catalyst under mild, aqueous, basic conditions for enhancing the sodium borohydride-mediated reduction of C–N multiplebonds such as oximes, imines, hydrazones and nitriles to produce the corresponding amines in good to excellent yields.
Highly dispersed potassium on alumina (K/Al2O3) acts as a metalatingagent towards enolizable compounds and the intermediate organopotassium derivatives can be alkylated with primary alkyl bromides. The reaction conditions are dependent on the substrate. In particular, tetrahydrofuran is the solvent of choice for the metalation of nitriles and aldehydeN,N-dimethylhydrazones at −60°C and of N-cyclohexyl
氧化铝上高度分散的钾(K / Al 2 O 3)作为可烯醇化化合物的金属化剂,中间有机钾衍生物可以用伯烷基溴化物烷基化。反应条件取决于底物。特别地,四氢呋喃是在-60℃下腈和醛N,N-二甲基hydr和N-环己基酮亚胺在室温下金属化的选择的溶剂,而己烷必须用于酮。
A Simple and Inexpensive Method for the Preparation of Imines and Azadienes
作者:A. Saoudi、A. Benguedach、H. Benhaoua
DOI:10.1080/00397919508015438
日期:1995.8
Abstract A number of imines and azadienes were prepared in high yield and good purity by using the condensation reactions of various aldehydes and ketones with amines over natural Algerian bentonite.